Backing Plate Car Function

What do backing plates actually do, and how do they work? Backing plates Backing plate rear

Backing Plates - Vehicle Components | MAT Foundry

Backing plate Backing plates Backing plate, rear right 8/63-67. 211-609-440b

What Do Backing Plates Actually Do, and How Do They Work?

Backing Plates - Vehicle Components | MAT Foundry

Backing Plate, Rear Right 8/63-67. 211-609-440B